scorm learning management system

and CPU The primary way to transfer data between device drivers : I/O device drivers are software modules that deal directly with hardware. " interrupt handlers and device drivers are typically completed by the hardware developer " device independent layer : i/o software except for device drivers User-level software : The user uses the device's system call or API. The usual I/O is called by the library

point in time only one process access to resources, such as memory resources access: for the entire memory resources are parallel access, However, it is mutually exclusive access for a memory unit of the smallest granularity in memory.Virtualization (leveraging multi-channel program design techniques to make each user (process/program) feel that the computer is acting as if it were a separate service)Async (The execution of the program is not consistent, but a walk-stop, forward speed is unpred

18.3 "Linux learning is not difficult"File System Management (3): InLinuxcreating a file system in the systemuse the MKFS command to create various file systems on a partition. the MKFS command itself does not perform the work of establishing the file system, but rather call

a data tableRight-click on the appropriate database to create a new tableEnter the data table name, stare, the following fields, you need to first click "Join?" button to add? field, first Field "userid", data type set to bigint, click Default Value column, where you can set your own active numberSave data table, prompt for no primary keySet the primary key, right-click on the UserID field row, create a new index PRIMARY, create the Index management

Operating System Concepts Learning Note 5 Operating System Management brief process managementA program that is in execution is called a process.The process requires a certain amount of resources (including CPU time, memory, files, I/O devices) to complete the task. These resources can be assigned to a process when the

system continuously provides fast response times. 3 . ScalabilityXFS is a full 64-bit file system that can support up to million T bytes of storage space. Support for oversized files and small file sizes is outstanding and supports a large number of directories. XFS uses a high table structure to ensure that the file system can be quickly searched and quickly al

15:02 F084B8A6-C9AB-425B-99DA-B64CB35E4FC2. /.. /sda5// Disk Partitioning /dev/sda5 of the UUID is a F084B8A6-C9AB-425B-99DA-B64CB35E4FC2then edit /etc/fstab file , Add the following at the end of the file. uuid= f084b8a6-c9ab-425b-99da-b64cb35e4fc2/mnt/www XFS Defaults 1 2This article extracts from "Linux Learning is not difficult" textbook, which is one of the most practical, theoretical and practical Linux Introductory materials. To read the ent

MySQL learning notes _ overview of MySQL database management system, learning notes _ learn MySQLZookeeper 1. MySQL Architecture C/S: client/server Architecture MySQL DBMS (Data Bank Management System): Database

Large enterprises spend nearly millions of dollars each year training employees, business partners and providers. Learning management systems are becoming increasingly complex, not only to meet physical equipment and web-based training delivery needs, but also to meet the needs of planning and scheduling activities. The implementation of the learning

can hold is 16GB, which is consistent with the file restriction table results. However, this method is not applicable when the block size is 2KB or 4KB, because the block larger than 2KB will be limited by the EXT2 file system itself, and the calculation results and the restriction table.(3) Super blockwhere this block records information about the entire file system, the main records are:Block and the tot

Operating system learning notes-memory management The content of this article is as follows: 1. Purpose of Memory Management 2. core tasks of Memory Management 3. Various memory management methods: 3.1 partition

Operating System Concepts Learning note 15 memory management (i) backgroundMemory is the center of modern computer operation. Memory has a very big group of words or bytes, and each word or byte has its own address. The CPU extracts instructions from memory based on the value of the program counter (PC), which can cause further reads and writes to a specific memo

, 32768fragmentspergroup8192inodespergroupsuperblockbackups storedonblocks:32768,98304,163840,229376,294912,819200,884736, 1605632 is writing inode table: complete creatingjournal (32768blocks): complete writing superblocksandfilesystemaccountinginformation: Complete Thisfilesystemwill beautomaticallycheckedevery29mountsor180days,whichever comesfirst.usetune2fs-cor-itooverride. [[emailprotected]~]# 650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/72/F0/wKioL1XwS8XSERK2AAOGqYLMqrs004.jp

can not show the English permission to make users understand, the Chinese regular is [\u4e00-\u9fa5].Background View query Chinese permission code is as follows:= Permission.objects. Get (Codename__iregex=u'[\u4e00-\u9fa5]') Print C # matches Chinese permissions (all queries) Permission.objects.filter (Codename__iregex=u'[\u4e00-\u9fa5]'). VALUES ()The user management interface is to add users and assign permissions to users, such as:Perhaps someone

= +, effective uid= +lienhua34:demo$su# ChownRoot tsys#chmodu+s tsys#ls-L Tsys-rwsrwxr-x1Root Lienhua347358October the at:Panax Notoginsengtsys# exitexitlienhua34:demo$./tsys./printuidsreal UID= +, effective uid=0During the execution of the above, we set the owner of the Tsys file to Superuser root and set the user ID bit. Thus, when executing the Tsys file, the process has a valid user ID of 0 (that is, root). The child process that calls the system

repair command: FSCK partition device file name Show disk status command: DUMPE2FS partition device file name mount Command:Query System mounted devices: Mount-lAuto Mount: mount-a--automatically mounts according to the contents of the profile/etc/fstabMount command format: Mount [-t file system] [-l volume label name] [-o Special Options] device file name mount pointmounting discs and USB sticks:Mountin